<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="app">
        <input type="button" value="切换显示" @click="toggleIsShow">
        <p v-if="isShow">白马2</p>
        <p v-if="isShow">白马程序员</p>
        <h2 v-if="temperature>=35">热死啦</h2>
      </div>
    <script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>
    <script>
    var app = new Vue({
        el: '#app',
        data: {
          isShow:false,
          temperature:40
        },
        methods:{
            toggleIsShow:function(){
                this.isShow = ! this.isShow;
            }
        }
      })
    </script>
</body>
</html>